Improvement in apparatus for converting reciprocating into rotary motion



ROBERT M. FnYER.

Improvement in Apparatus'for Converting Reciprocating into Rotry Motion.v

Patented March I9, 1872.`

NVBNTOR AM PHOTU-LTHORAHIC C04 MX (05505175.79 FROEESSV/ UNITED STATES rrron.

ROBERT M. FRYER, OF NASHVILLE, TENNESSEE, ASSIGNOB OF ONE-HALF HIS RIGHT TO JOHN B. ROMANS, OF SAME PLACE.

IMPROVEMENT IN APPARATUS FOR CONVERTING RECIPROCATING INTO ROTARY MOTION.

Specification forming part of Letters Patent No. 124,805, dated March 19, 1872.

SPECIFICATION. To all whom it may concern:

Be it known that I, ROBERT M. FRYER, of the city of Nashville, in the county of Davidson and State of Tennessee, have invented certain new and useful Improvements in Engine-Connections, of which the following is a specication V N cttw@ and Object.

I General Description 'with References to the Accompanying Drawing- In which A A represent a vertical section of two cylinders, which are provided with pistons B B, connected with rods C O. D is a cross of four arms, E, F, G, and H. I I f are vertical guides,for and between which cross-head J reciprocates. K is a crank, to which is connected E, (one of the cross-arms.) The opposite arm F is connected with cross-head J.

Piston-rod C is connected with the cross-arm Gr by means of link L. Piston-rod O is connected with arm H by links L. M, N, O, and P are the openings into the cylinders.

Operation.

When force is applied to either ofthe pistons separately the arm of the cross in connection therewith has a tendency to revolve the whole cross; but as this is prevented at the top by means of cross-head J, (which acts as a fulcrulm) the bottom or opposite arm is forced to the rightor lett, (as the case may be,) while at the same time itis forced in the opposite direction to the force applied to the ing force.

said piston when equal force is applied (in the same direction) to both pistons. The whole cross acts as an ordinary connectingrod, -in connection with a crank and reciproeatin g motion, inasmuch as it has no vibrat- Now, by referring to the drawing it will be observed that the crank K is situated at the lower part of the cross D, and is placed at the ,upper extremity of its travel, and the pistons B Bl are at the upper end of their stroke. Steam being first admitted through opening M, the piston B is driven downward, and the crank K is moved in the direction of the arrow; and when said crank has traveled about forty-live degrees of a circle steam is admitted through opening N, which produces downward force upon piston B, which, until then, has moved but a short distance. Both pistons now act together in forcing the crank around to about one hundred and thirty-five degrees from the starting point, when the pressure is 'relieved (or partially relieved) from the piston B, which at this time moves slow, and piston B" is left to carry the crank around to one hundred and eighty degrees from the starting point, when steam is admitted through opening O, (the pressure from piston B" being very soon after relieved,) which forces piston B upward, moving crank K in the direction of the arrow; and when said crank arrives at about two hundred and twenty-live degrees from the startingpoint steam is admitted through'openingl?, which produces upward force at piston B, (which, until then, has moved slow,) and thus both pistons are broughtinto action and carry the crank to about three hundred and fifteen V degrees from the starting point, when the pressure is relieved, or partially relieved, from piston B, and piston B carries the crank up to the point from which the operation began.

It may be readily seen that the above cmbination will produce rotary motion with the I steam supply adjustment therein named, though in practicel it may prove advantageous to vary this adjustment. It may be also stated, the position of the crank K and cross-head J may be reversed 5 or that all the present vertons or their connections, a crank and areciprocating cross-head or other suitable guide, combined substantially as and for the purpose above set forth.

ROBERT M. FRYER.

Witnesses:

' BENNET B. SMrrH,

JAMEs C. STEVENS. 

